The Trusted Two-dimensional Code System based on Certificate-based Signature Scheme

With the high capacity, fast recognition speed, as well as strong correction ability, two-dimensionalcode is widely used in many fields such as e-commerce. However, how to guarantee the authenticityof two-dimensional code becomes an urgent security demand. In this paper, we design and implementan authentic two-dimensional code system based on certificate-based signature scheme (CBS).The system includes trusted center module, authentic two-dimensional code generation module, andauthentic two-dimensional code verification module. The trusted center is in charge of initializingsystem parameters and issuing certificates. Two-dimensional code generation module achieves secretkey reading from USBKey and two-dimensional code generation functions. Two-dimensional codeverification module is responsible for two-dimensional code scanning and CBS signature verification.Bilinear pairing is adopted to implement the CBS algorithms. The web interface is built withJavaScript. Further productization of the prototype system will play an important role in promotingsecure application of two-dimensional code.